diff --git a/crates/engine/src/commands/prop.rs b/crates/engine/src/commands/prop.rs
index 5248949a..8246d441 100644
--- a/crates/engine/src/commands/prop.rs
+++ b/crates/engine/src/commands/prop.rs
@@ -631,11 +631,12 @@ fn reset(s: &mut Session, p: &Value) -> Result<Value> {
     let (cid, lid, uid) = prop_ref(s, p, "prop.reset")?;
     let def = p.get("default").cloned();
     let own = default_value(s, cid, lid, uid);
-    with_prop(s, "Reset Property", None, cid, lid, uid, |pr, _| {
-        pr.keys.clear();
+    with_prop(s, "Reset Property", None, cid, lid, uid, |pr, t| {
         pr.expr = None;
+        // An animated property keeps its keyframes and gets the default as a key at the
+        // current time, as in After Effects (#1078).
         if let Some(d) = def.as_ref().and_then(|d| pr.value.coerce_json(d)).or(own) {
-            pr.value = d;
+            pr.set_value_at(t, d);
         }
         Ok(Value::Null)
     })
@@ -1238,7 +1239,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Reset Property",
             [],
             None,
-            "{layer?, path|prop, default?} → removes keyframes and expression; the value becomes `default`, else the property's own (an effect parameter's, a Transform property's)",
+            "{layer?, path|prop, default?} → removes the expression; the value becomes `default`, else the property's own (an effect parameter's, a Transform property's), as a keyframe at the current time when the property is animated",
             has_layers,
             reset
         ),
diff --git a/crates/engine/src/tests_timeline.rs b/crates/engine/src/tests_timeline.rs
index 9014faeb..938056dd 100644
--- a/crates/engine/src/tests_timeline.rs
+++ b/crates/engine/src/tests_timeline.rs
@@ -597,8 +597,10 @@ fn reset_gives_a_property_its_default() {
     assert_eq!(v(&s, "transform/anchor"), KV::Vec3([50.0, 50.0, 0.0]), "the solid's centre");
     assert_eq!(v(&s, "transform/position"), KV::Vec3([200.0, 150.0, 0.0]), "the comp's centre");
     assert_eq!(v(&s, "transform/scale"), KV::Vec3([100.0; 3]));
-    assert_eq!(v(&s, "transform/rotation"), KV::Scalar(0.0));
-    assert!(!prop(&s, l, "transform/rotation").is_animated());
+    // Animated: the default becomes the key at the current time (0 s), the 1 s key stays (#1078).
+    let rot = prop(&s, l, "transform/rotation");
+    assert_eq!(rot.keys.len(), 2);
+    assert_eq!(rot.value_at(effectcraft_time::Tick::ZERO), KV::Scalar(0.0));
     assert_eq!(v(&s, "transform/opacity"), KV::Scalar(100.0));
     assert!(prop(&s, l, "transform/opacity").expr.is_none());
     assert_eq!(v(&s, "effects/#1/blurriness"), blur);
@@ -607,6 +609,31 @@ fn reset_gives_a_property_its_default() {
     assert_eq!(v(&s, "transform/opacity"), KV::Scalar(30.0));
 }
 
+/// #1078: resetting an animated property keeps its keyframes and keys the default at the
+/// current time, as in After Effects; undo brings the old keys back.
+#[test]
+fn reset_keys_the_default_on_an_animated_property() {
+    let (mut s, l) = setup();
+    animate(&mut s, l, "transform/scale", &[(0.0, json!([50, 50, 100])), (2.0, json!([150, 150, 100]))]);
+    s.execute("time.set", json!({"time": 1})).unwrap();
+    s.execute("prop.reset", json!({"layer": l, "path": "transform/scale"})).unwrap();
+    let pr = prop(&s, l, "transform/scale");
+    let at = |sec: f64| pr.value_at(effectcraft_time::Tick::from_seconds_f64(sec));
+    assert_eq!(pr.keys.len(), 3, "the 0 s and 2 s keys stay, one is added at 1 s");
+    assert_eq!(at(0.0), KV::Vec3([50.0, 50.0, 100.0]));
+    assert_eq!(at(1.0), KV::Vec3([100.0; 3]));
+    assert_eq!(at(2.0), KV::Vec3([150.0, 150.0, 100.0]));
+    // On a key, the key takes the default.
+    s.execute("time.set", json!({"time": 2})).unwrap();
+    s.execute("prop.reset", json!({"layer": l, "path": "transform/scale"})).unwrap();
+    let pr = prop(&s, l, "transform/scale");
+    assert_eq!(pr.keys.len(), 3);
+    assert_eq!(pr.value_at(effectcraft_time::Tick::from_seconds_f64(2.0)), KV::Vec3([100.0; 3]));
+    s.execute("edit.undo", json!({})).unwrap();
+    s.execute("edit.undo", json!({})).unwrap();
+    assert_eq!(prop(&s, l, "transform/scale").keys.len(), 2);
+}
+
 /// #363: dropped on one of the target's values the pick whip picks that dimension
 /// (`position[0]`), as in After Effects; a multi-dimension property follows it on every axis.
 #[test]
diff --git a/docs/agents.md b/docs/agents.md
index 3b1116a7..d36a766a 100644
--- a/docs/agents.md
+++ b/docs/agents.md
@@ -573,8 +573,9 @@ Extension points and the bundled extensions: [plugins.md](plugins.md).
   (`effectControls.prop.<uid>.value[.<d>]`), it runs `prop.pickWhip`: the reference replaces the
   property's expression, or is added as one, and the expression is enabled.
 * A property's menu (right-click its name; entries `timeline.prop.<uid>.menu.<entry>`): Reset
-  (`prop.reset`: no keyframes or expression, and the property's default value, an effect
-  parameter's or a Transform property's), Edit Value… (`prop.set {layer, prop}` without `value`
+  (`prop.reset`: no expression, and the property's default value, an effect parameter's or a
+  Transform property's; an animated property keeps its keyframes and gets the default as a
+  keyframe at the current time), Edit Value… (`prop.set {layer, prop}` without `value`
   opens the value dialog), Separate Dimensions (Position: `prop.separateDimensions {layer,
   value}`), Add / Remove Expression (`prop.setExpression {layer, prop}`) and Add Property to
   Essential Graphics (`essential.addProperty`).